diff --git a/rpcs3/Emu/SysCalls/lv2/sys_mmapper.cpp b/rpcs3/Emu/SysCalls/lv2/sys_mmapper.cpp
index 0cd3014d4..c4d4db29c 100644
--- a/rpcs3/Emu/SysCalls/lv2/sys_mmapper.cpp
+++ b/rpcs3/Emu/SysCalls/lv2/sys_mmapper.cpp
@@ -33,6 +33,14 @@ s32 sys_mmapper_allocate_address(u64 size, u64 flags, u64 alignment, vm::ptr<u32
 		return CELL_ENOMEM;
 	}
 
+	// This is a 'hack' / workaround for psl1ght, which gives us an alignment of 0, which is technically invalid, 
+	//  but apparently is allowed on actual ps3
+	//  https://github.com/ps3dev/PSL1GHT/blob/534e58950732c54dc6a553910b653c99ba6e9edc/ppu/librt/sbrk.c#L71 
+	if (!alignment && size == 0x10000000)
+	{
+		alignment = 0x10000000;
+	}
+
 	switch (alignment)
 	{
 	case 0x10000000:
@@ -317,7 +325,7 @@ s32 sys_mmapper_search_and_map(u32 start_addr, u32 mem_id, u64 flags, vm::ptr<u3
 
 	*alloc_addr = addr;
 
-	return CELL_ENOMEM;
+	return CELL_OK;
 }
 
 s32 sys_mmapper_unmap_memory(u32 addr, vm::ptr<u32> mem_id)